I think I ended up with a total of 2.4-2.5 cuft, but I could be wrong.

 

I want to say the newest mags are .12, but I could be wrong. If I remember right my box total was 2.4xx and after displacement I got 2.2 ft^3.

Also, I've tried polyfil and w/o in various boxes and I've yet to really hear a susbtantial difference.